<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

let user={
    "name":"张三",
    "age":18,
    "sex":"男",
    "address":"北京"
}
log(user.name);
log(user.age);
log(user.sex);
log(user.address);

</body>
</html>